Brh.Forms.PopupNotify.Collapse C# (CSharp) Метод

        private void Collapse()
        {
            lock(openPopups)
            {
                int thisIndex = openPopups.IndexOf(this);

                for(int i=thisIndex-1;i >= 0;i--)
                {
                    PopupNotify popup = (PopupNotify)openPopups[i];

                    if(sysLoc == SystemTrayLocation.BottomLeft || sysLoc == SystemTrayLocation.BottomLeft)
                    {
                        popup.Top += Height;
                    }
                    else
                    {
                        popup.Top -= Height;
                    }
                }

                openPopups.RemoveAt(thisIndex);
            }
        }